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Priority to JP5885884UpriorityCriticalpatent/JPS60172892U/ja
Publication of JPS60172892UpublicationCriticalpatent/JPS60172892U/ja
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Publication of JPS644953Y2publicationCriticalpatent/JPS644953Y2/ja
Support arrangement including base support means and elevatable support means to transport a drawworks and drilling mast supported thereon and for positioning at a drilling location